Camera lenses selection

Focal length, angle of view and various types of lenses

Some sounds can be heard when talking about taking camera or picture, wide angle, telephoto, focal length etc. Or in the case of lenses, it is called millimeter. What exactly these things mean, what effect it has on the image may seem much unclear to new photographers later on. Trying to clarify the matter.

You may have noticed that digital cameras are compared to 35mm cameras. The previous day's 35mm camera is still compared to the standard. As mentioned, such a lens is 16-75 mm, then it is mentioned as compared to 35 mm.

If we want to get exactly what we see in the picture with the naked eye, we can call it normal lens. It has been calculated that such images are found in lenses ranging from 50 to 55 mm. So these are known as standard lenses as lenses.

If the focal length is less than this, then the front view will be more visible than the naked eye. The lens captures much more angular vision, hence the name wide angle lens. Basically, lenses with focal lenses below 35 mm are known as wide angles. If the amount of angle is too much then the front view is rounded. Like a fish's eye, it's called a fish-eye lens.

Conversely if the focal length is greater then no one gets smaller for the front view and certain parts are seen. It can be called a narrow angle lens, but in reality it is called a long focus lens, or a telephoto lens or a zoom lens.

Specifically the parts of lenses

Fisci lens: 6 to 8 mm. Can hold at least 180 degrees. Sometimes there are lenses that can hold up to 220 degrees (on the back of the camera).

Wide angle lens: 18 to 35 mm. These are used for general work. It has more depth of field, making it more suitable for landscape, interior, architecture, etc. work.

Standard lens: 50mm. It is most used because it is close to human eyes. A much higher aperture can be used to get better images in low light.

Long focus lens: 80 to 400 mm. Something farther away is more suitable for taking pictures as the subject is much larger. Definitely used to take pictures of something far away. Depth of field decreases as distance increases.

Superzum or Extreme Long Focus Lens: Lenses above 400 mm are included in this group. Birds or wild animals are more suitable for this type of subject. It is also often called a telephoto lens. Usually these are large in size and overweight so use a tripod. Journalists use them to take pictures from a distance while playing in the stadium.

Some special types of lenses

Macro lens: This special type of lens is used to pick up the fly's eye or a small flower from the grass. Although its focal lens is 50 to 200 mm, it is available in a much larger size due to its special focus. Ordinary lenses can be used as macro lenses using an adapter called an extension tube. Many people make such tubes themselves. This is done by keeping the main lens at a distance from the camera.

Zoom Adapter: A type of adapter used to further increase the maximum focal length of a lens. Using a 2x adapter means doubling the previous focal length of the lens. It is mounted between the camera and the lens.